互动封闭仿真课堂
1、智能交互 2、电子板书式视频教学 3、在线互动问答 4、封闭课堂启发式教学方式
随堂测试、知识梳理、易错点揭示、总结启迪智能错题本
听课中的错题能自动加入错题本，课后可方便复习及导出错题本升级服务
在线答疑、课后同类题练习、讲义下载、短信提醒( )2. Is this factory ____ some foreign friends visited last Friday?
A. that B. where C. which D. the one
( )3. Is this the factory _____ he worked ten years ago?
A. that B. where C. which D. the one
( )4. The wolves hid themselves in the places ______ couldn’t be found.
A. that B. where C. in which D. in that
( )5. The freezing point is the temperature __________ water changes into ice.
A. at which B. on that C. in which D. of what
( )6. The reason is _____ he is unable to operate the machine.
A. because B. why C. that D. whether
( )7. I’ll tell you ___ he told me last week. A. all which B. that C. all that D. which
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